Phosphine-Imidazolyl Ligands for the Efficient Ruthenium-Catalyzed Hydrogenation of Carboxylic Esters
作者:Kathrin Junge、Bianca Wendt、Felix Alexander Westerhaus、Anke Spannenberg、Haijun Jiao、Matthias Beller
DOI:10.1002/chem.201200408
日期:2012.7.16
The synthesis of phosphine–imidazolyl ligands 1 and 2 in good yields is presented. In combination with [Ru(benzene)Cl2}2], ligands 1 c and 1 e formed efficient catalyst systems for the selective hydrogenation of various carboxylic esters into their corresponding primary alcohols. Furthermore, the structures of four ruthenium complexes with ligands 1 b, 1 c, 1 d, and 1 e were determined by X‐ray crystallography
提出了高产率的膦-咪唑基配体1和2的合成。与[Ru(苯)Cl 2 } 2 ]结合,配体1c和1e形成有效的催化剂体系,用于将各种羧酸酯选择性加氢成它们相应的伯醇。此外,通过X射线晶体学测定了具有配体1b,1c,1d和1e的四种钌配合物的结构,其显示出根据配体结构的不同配位模式的形成。